Datasheet

UG-165 Evaluation Board User Guide
Rev. A | Page 4 of 24
EVALUATION BOARD HARDWARE
The evaluation board requires the use of an SDP-S motherboard
to program the device. The SDP-S board is not included with
the evaluation board and must be purchased separately. The
EV-ADF4113HVSD1Z schematics are shown in Figure 21 to
Figure 23.
POWER SUPPLIES
The board is powered from external banana connectors and an
external 15 V source connected to the VP SMA connector. The
supply voltage on the banana connectors can vary between 6 V
and 12 V. The power supply circuit provides 3.0 V to V
DD
on the
board (which supplies the ADF4113HV AV
DD
and DV
DD
pins)
and allows the user to choose either 3.0 V or 5 V for the VCO
supply. The default settings are 3.0 V for the ADF4113HV V
DD
and 5 V for the VCO supply. Note that V
DD
should never exceed
3.3 V because exceeding this voltage level may damage the device.
The supply pin, V
P
, must be driven externally via J10 with 15 V.
External power supplies can be used to directly drive the device.
In this case, the user must insert SMA connectors as shown in
Figure 2.
INPUT SIGNALS
The necessary reference input comes from an on-board tempera-
ture compensated crystal oscillator (TCXO) of 25 MHz frequency.
Alternatively, this can be sourced from an external generator. In
this case, remove R16 and R14 to disconnect the TCXO from the
supply and from the reference path, insert Connector J11 or the
J5 edge-mount connector, and connect the external generator to
the connector. A low noise, high slew rate reference source is
best for achieving the stated performance of the ADF4113HV.
Digital SPI signals are supplied through the SDP connector, J1.
Using the SDP-S board is recommended. The SDP-Blackfin
(SDP-B) board can also be used, but Resistor R57 must be removed
from the SDP-B board. Some additional spurious low frequencies
may appear if the SDP-B connector is used.
Figure 2. Evaluation Board Silkscreen
OUTPUT SIGNALS
All components necessary for local oscillator (LO) generation are
inserted on board. The PLL is made up of the ADF4113HV
synthesizer, a passive loop filter, and the VCO. This board is
supplied with a VCO ROS-2260W+ from Mini-Circuits, which
covers a frequency range from 1290 MHz to 2260 MHz. A low-
pass filter of 50 kHz loop bandwidth is inserted between the
charge pump output and the VCO input. The VCO output is
available at RFOUT through a standard SMA connector, J2. The
MUXOUT signal can be monitored at Test Point T8 or at SMA
Connector J3.
09150-002